1999 318ti wont start

[jayjay]

While driving on the motorway the engine cut out. It will now turn over but not fire up. I think it has fuel but no spark. I tried a different coil pack but it made no difference. Any ideas?

[bmwracerchick]

ok im going to make a dumb female suggestion since I know just a little about the engine when it comes to that, what about new spark plugs? lol thats my genius suggestion. I dont know though, hopefully someone here can give you a better answer then that

[m3wannabe]

well, i drive a 70 camaro. it's a little different, but if moisture gets into the distributor, i know yours is a coil pack, it will kill it. but also, check your battery/starter cables. take them off, clean them, and use the spray to prevent corrosion, one day everyone thought my starter was bad, it just clicked a lot. turned out the negative battery terminal was loose. so i would start checking the cables.

[weezer]

Make sure you actually have spark. Unfortunately, unlike distributor type ignition, you can't just unplug the lead cable and rub it against the ground while starting and see if any spark comes out. Best way, is to use the scan tool and see what the ECU is saying?
Good luck.

[m3wannabe]

o yea, you guys have computers lol.

[GDB]

Make sure your battery and starter are in good shape.

[jayjay]

I have now checked all fuses relays and tried 2 new coil packs- seem s to be maby an immobilizer problem now i dont know?? It seems to have a slight spark every now and then and there is plenty of fuel and pressure!! does any 1 know if it has a crank sensor if so where is it located?? There is live, Earth and a pulsing live for each plug to the coil pack but no further the leads are also good any ideas its doin my ed in!!!